That night, the Detective Boys confront him and reveal they deduced he planned to make his suicide look like an accident in order to get money from the insurance to pay for his grand daughter's surgery; Evidenced from the inconsistency conversation they had before. Daita confesses and reveals that after losing a winning lottery ticket, he contemplated suicide. Conan reveals that he must have kept the lottery ticket in the case containing his reading glasses after reading the winning numbers from the newspaper. Daita, happy to have the money for the surgery, jokingly tells the Detective Boys he also thought of robbing a bank causing the Detective Boys to reply they saw a man suiting Shuichi Akai's description.

The next day, Kogoro receives an anonymous request to investigate a case involving red shirts with long sleeves. The mysterious caller requests to meet them on the third floor of a department store. At the store, the three then run into a man who explains he has been strapped with bombs.

The man explains he was knocked unconscious in the bathroom and found himself like that. He explains the bomber told him that if anyone leaves the floor or calls the police, the bomber will detonate the bombs in the building. He discloses the bomber's demands, to find the sender of thirteen red shirts.

Hostage Situation - (Potential) Bombing

Location:

Sports department of the Beika Department Store

Victim:

Man strapped with bombs, and the rest of the people on the department store floor

Someone knocked out and strapped a bomb to a random man and placed more bombs around the floor exits. The bomber's demands are to locate the sender of the thirteen red shirts he left with the bomb-strapped man.

Meanwhile, Jodie has been searching for evidence of Akai in the department store. While Conan and Kogoro investigate, Conan discovers from the receipt that the shirts were bought on different days but always at 12:28 and that there are creases on the thirteen red shirts.

Gin and Kir

At the same time, the Black Organization waits outside the department store with snipers waiting for Akai. Gin holds a gun to Kir's head explaining that if Akai is alive, he will kill her.

Conan arranges the red shirts in the order they were sent and folds them along the creases and deduces that the way the shirts are position reveal a code. Elsewhere, Jodie discovers that Scar Akai is on the floor where the bomb is. Conan uses the cashier room's computer in order to search for a disaster that occurred in a snowy mountain on December 28.

Accident or Murder? (Past)

Location:

Snowy mountains

Victim:

Daisaku Maruoka

Time:

13 years ago

Cause of death:

Officially ruled accidental death via avalanche

Conan deduces this accident in the snowy mountains is related to the mystery behind the thirteen red shirts.

Okiya, who happens to be on the same floor, examines the red shirt and concludes the sender is related to a disaster that occurred on a snowy mountain and begins texting his deduction to Kogoro. Okiya then recognizes Scar Akai and the crowd and hides while smiling suspiciously. Conan tranquilizes Kogoro and discloses that the bomber's behavior is inconsistent; He was desperate to search for the sender of the red shirts, yet he found the time to knock and strap a bomb onto the man. Conan reveals that the man strapped with the bomb is actually the bomber.

Vermouth talks to Gin about an unstated plan she made with the boss's approval.

Conan reveals that the sender of the red shirt was the cashier of the sports department, Mai Seta. He explains it would be impossible to always have a shirt bought on 12:28. Seta reveals that the bomber murdered her father thirteen years ago in order to hide the fact he was embezzling money from her father's company. Conan reveals that the shirts creases are flag signals conveying the message "I saw you burying it". The bomber denies the murder until Conan discloses that the body must be near the cabin since the bomber was a novice at mountaineering. The bomber confesses and explains he wanted the best for his spoiled son who occasionally runs away from home.

Vermouth whispers to Gin about an unstated plan she made with the boss' approval.

Seta asks Conan how he knew it was related to the mountains, which Kogoro answers by reading the deductions he received from a cellphone text message. Conan and Ran trace the call to a man who reveals a man resembling Akai was the one who gave him the phone. Conan attempts to catch up to scar Akai and runs into Jodie and Andre. Andre reveals the Black Organization are waiting outside with a sniper causing Conan and Jodie to realize their plan. Outside the store, scar Akai is seen on Chianti's scope as he gives her a smile. Gin decides to drop the assassination commenting how Bourbon always likes to do what he pleases.